Minor bumps

[tsloughter]

I got scared after #784 and made these minor version bumps... API probably doesn't need to be at all. SDK now that its fixed to work with older export versions also could probably be a patch. But.. feels safer.

Note I retired the previous patch versions from hex.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.20%. Comparing base (4dd6b60) to head (fee4ce7).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #786      +/-   ##
==========================================
+ Coverage   73.19%   73.20%   +0.01%     
==========================================
  Files          64       64              
  Lines        1940     1941       +1     
==========================================
+ Hits         1420     1421       +1     
  Misses        520      520              

Flag	Coverage Δ
api	69.90% <ø> (ø)
elixir	17.32% <ø> (ø)
erlang	74.53% <100.00%> (+0.01%)	⬆️
exporter	73.17% <ø> (+0.10%)	⬆️
sdk	77.30% <100.00%> (ø)
zipkin	54.16% <ø> (ø)

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[shaharz]

We're seeing issues with the zipkin exporter in 1.5.0:

span exporter threw exception: exporter=:opentelemetry_zipkin exception error: undefined function opentelemetry_zipkin:export/3
  in function  otel_batch_processor:export/3 (/build/deps/opentelemetry/src/otel_batch_processor.erl, line 444)
  in call from otel_batch_processor:send_spans/3 (/build/deps/opentelemetry/src/otel_batch_processor.erl, line 430)

Looks like this change was reverted in a later commit, was that intentional? Would be great to have it back 😄

[tsloughter]

Argh, thanks, apparently we don't have integration tests for zipkin and the batch processor :(